470       iset_(nullptr),  in HLoopOptimization()
547     iset_ = &iset;  in LocalRun()
555     iset_ = nullptr;  in LocalRun()
659         for (HInstruction* i : *iset_) {  in SimplifyInduction()
662         DCHECK(CheckInductionSetFullyRemoved(iset_));  in SimplifyInduction()
2239   iset_->clear();  in TrySetPhiInduction()
2267       iset_->insert(i);  // copy  in TrySetPhiInduction()
2275   DCHECK(iset_->empty());  in TrySetPhiReduction()
2294           iset_->size() == 1;  in TrySetPhiReduction()
2295       iset_->clear();  // leave the way you found it  in TrySetPhiReduction()
2309   iset_->clear();  in TrySetSimpleLoopHeader()
2342           iset_->insert(c);  in TrySetSimpleLoopHeader()
2343           iset_->insert(s);  in TrySetSimpleLoopHeader()
2359     if (!instruction->IsGoto() && iset_->find(instruction) == iset_->end()) {  in IsEmptyBody()
2384     if (iset_->find(user) == iset_->end()) {  // not excluded?  in IsOnlyUsedAfterLoop()
2390           iset_->insert(user);  in IsOnlyUsedAfterLoop()
2413       if (iset_->find(user) == iset_->end()) {  // not excluded?  in TryReplaceWithLastValue()
2429       if (iset_->find(user->GetHolder()) == iset_->end()) {  // not excluded?  in TryReplaceWithLastValue()
2468   for (HInstruction* i : *iset_) {  in CanRemoveCycle()